3) Through the analysis of barriers of establishment of clausula rebus sic stantibus in conception and concrete operation;some effective measures are put forward to get rid of those barriers;

• (3)通过对我国法确立情事变更制度的障碍的讨论，分析了该制度在观念和具体操作方面存在的障碍，提出了排除障碍的方法；